2,5-diketo-D-
gluconic acid
reductase A
2,5-diketo-D-
gluconic acid
reductase B
Lactaldehyde
dehydrogenase
L-lactate
dehydrogenase
[cytochrome]
Pyruvic acid
Pyruvaldehyde
NADPH
H+
(S)-
lactaldehyde
NADP
NAD
H2O
NADH
H+
L-Lactic acid
oxidized
electron
acceptor
Reduced
acceptor
Glycolysis and
Pyruvate
Dehydrogenase